Besson MB.35

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MB.35 Passe Partout
Besson MB.35 Les Ailes April 22, 1926.jpg
Role observation floatplane
National origin France
Manufacturer Besson
Designer Marcel Besson
First flight 1926[1]
Primary user French Navy
Number built 2
Variants Besson MB.411

The Besson MB.35 Passe Partout was a French two-seat spotter and observation floatplane, designed by Besson. It was intended to serve on Surcouf a very large (for its day) submarine, stowed in a sealed hangar.[1] The first aircraft was destroyed during trials and the second was converted to the MB.41, prototype of the Besson MB.411, which did serve on Surcouf.[2]

Operators[edit]

 France

Specification (MB.35)[edit]

Besson MB.35 3-view drawing from L'Air December 1,1926

Data from Jane's all the World's Aircraft 1928[3], Biplanes, Triplanes, and Seaplanes[1], Submarines with wings : the past, present and future of aircraft-carrying submarines[2]

General characteristics

  • Crew: 2
  • Length: 7.3 m (23 ft 11 in) wings spread
  • Wingspan: 9.85 m (32 ft 4 in) wings spread
  • Width: 2.2 m (7 ft 3 in) wings folded for submarine stowage
  • Length folded: 6.5 m (21 ft)
  • Height: 2.53 m (8 ft 4 in)
  • Wing area: 16.5 m2 (178 sq ft)
  • Empty weight: 540 kg (1,190 lb)
  • Gross weight: 765 kg (1,687 lb)
  • Powerplant: 1 × Salmson 9AC 9-cylinder air-cooled radial piston engine, 89 kW (120 hp)
  • Propellers: 2-bladed fixed pitch propeller

Performance

  • Maximum speed: 160 km/h (99 mph; 86 kn)
  • Range: 346 km (215 mi; 187 nmi)
  • Ferry range: 644 km (400 mi; 348 nmi) with overload tank in rear cockpit
  • Service ceiling: 4,800 m (15,700 ft)
  • Wing loading: 47.5 kg/m2 (9.7 lb/sq ft)
  • Power/mass: 0.1174 kW/kg (.0714 hp/lb)

References[edit]

  1. ^ a b c Sharpe, Michael (2000). Biplanes, Triplanes, and Seaplanes. London: Friedman/Fairfax Books. p. 80. ISBN 1-58663-300-7.
  2. ^ a b Heinemann, with a foreword by Ed.; Treadwell, Terry C. (1985). Submarines with wings : the past, present and future of aircraft-carrying submarines. London: Conway Maritime Press. pp. 75–83, 113. ISBN 0851773699.
  3. ^ Grey, C.G., ed. (1928). Jane's all the World's Aircraft 1928. London: Sampson Low, Marston & company, ltd. pp. 113c–114c.